<template>
  <a-select
    ref="selectRef"
    v-model:value="childSelectedValue"
    class="t-antd-select-table"
    dropdownClassName="t_antd_select_dropdown"
    :style="`width:${typeof selectWidth === 'number' ? `${selectWidth}px` : `${selectWidth}`}`"
    :mode="mode"
    :open="open"
    v-bind="selectAttr"
    :value-key="keywords.value"
    :filterOption="false"
    @search="filterMethodHandle"
    @dropdown-visible-change="visibleChange"
    @deselect="removeTag"
    @clear="clear"
    @input-key-down="selectKeyup"
  >
    <template #notFoundContent>
      <div class="t-table-select__table" :style="{ width: `${tableWidth}px` }">
        <a-table
          ref="selectTable"
          :data-source="state.tableData"
          :columns="columns"
          bordered
          :row-key="getRowKey"
          :row-class-name="getRowClass"
          :pagination="isShowPagination && table.pagination"
          :row-selection="
            rowSelection || {
              selectedRowKeys: state.selectedRowKeys,
              onChange: onSelectChange,
              onSelectNone: onSelectNone,
              type: mode === 'multiple' ? 'checkbox' : 'radio'
            }
          "
          :customRow="rowClick"
          v-bind="$attrs"
        >
          <template #[item]="scope" v-for="item in renderArr">
            <slot :name="item" :scope="scope" v-bind="scope || {}"></slot>
          </template>
          <slot></slot>
        </a-table>
      </div>
    </template>
  </a-select>
</template>
<script lang="ts">
export default {
  name: "TAntdSelectTable"
};
</script>
<script setup lang="ts">
import { computed, useAttrs, ref, watch, reactive, onMounted, useSlots } from "vue";
const props = defineProps({
  modelValue: {
    type: [String, Number, Array]
  },
  // table所需数据
  table: {
    type: Object,
    default: () => {
      return {};
    }
  },
  // 表头数据
  columns: {
    type: Array as unknown as any[],
    default: () => []
  },
  // 单选框--是否开启点击整行选中
  rowClickRadio: {
    type: Boolean,
    default: true
  },
  // 列表项是否可选择
  rowSelection: {
    type: Object
  },
  // 是否显示分页
  isShowPagination: {
    type: Boolean,
    default: false
  },
  // 下拉数据指向的label/value
  keywords: {
    type: Object,
    default: () => {
      return {
        label: "label",
        value: "value"
      };
    }
  },
  // 多选 'multiple'
  mode: {
    type: String
  },
  // 单选是否开启键盘事件
  isKeyup: {
    type: Boolean,
    default: false
  },
  // select宽度
  selectWidth: {
    type: [String, Number],
    default: 200
  },
  // table宽度
  tableWidth: {
    type: Number,
    default: 550
  },
  // 设置默认选中项--keywords.value值（单选是String, Number类型；多选时是数组）
  defaultSelectVal: {
    type: Array as unknown as any[]
  }
});

const selectAttr = computed(() => {
  return {
    allowClear: true,
    showSearch: true,
    dropdownMatchSelectWidth: false,
    ...useAttrs()
  };
});
const slots = useSlots();
const renderArr = Object.keys(slots);

const isDefaultSelectVal = ref(true); // 是否已经重新选择了
const open = ref(false);
const nowIndex = ref(-1);
const state: any = reactive({
  defaultSelectValue: props.defaultSelectVal, // 默认选中
  tableData: props.table.data, // table数据
  activeTableRow: {}, // 键盘上下键选中项
  // 选中KEY
  selectedRowKeys: [] as (string | number)[],
  // 选中行
  selectedRows: []
});
// 获取ref
const selectRef: any = ref<HTMLElement | null>(null);
const selectTable: any = ref<HTMLElement | null>(null);
// 抛出事件
const emits = defineEmits(["checkedChange", "update:modelValue"]);
watch(
  () => props.table.data,
  val => {
    state.tableData = val;
  },
  { deep: true }
);
watch(
  () => props.defaultSelectVal,
  val => {
    // console.log("defaultSelectValue--watch", val);
    state.defaultSelectValue = val;
    if (val && isDefaultSelectVal.value) {
      defaultSelect(val);
    }
  },
  { deep: true }
);
// vue3 v-model简写
let childSelectedValue = computed({
  get() {
    return props.modelValue;
  },
  set(val) {
    // console.log("v-model简写", val);
    emits("update:modelValue", val);
  }
});
onMounted(() => {
  // 设置默认选中项
  if (state.defaultSelectValue && isDefaultSelectVal.value) {
    // console.log("state.defaultSelectValue--", state.defaultSelectValue);
    defaultSelect(state.defaultSelectValue);
  }
});
// 单选or 多选
const onSelectChange = (selectedRowKeys: any, selectedRows: any) => {
  setTimeout(() => {
    // console.log("选择", selectedRowKeys, selectedRows);
    state.selectedRowKeys = selectedRowKeys;
    state.selectedRows = selectedRows;
    isDefaultSelectVal.value = false;
    if (state.selectedRowKeys.length > 0 && state.selectedRows.length > 0) {
      if (props.mode === "multiple") {
        childSelectedValue.value =
          state.selectedRows.length > 0 && state.selectedRows.map((item: { [x: string]: any }) => item[props.keywords.label]);
      } else {
        // console.log("单选", state.selectedRows[0]);
        state.activeTableRow = state.selectedRows[0];
        childSelectedValue.value = state.selectedRows[0][props.keywords.label];
        blur();
      }
    } else {
      childSelectedValue.value = undefined;
    }
    emits("checkedChange", state.selectedRowKeys, state.selectedRows);
  }, 10);
};

const rowClick = (record: { [x: string]: any }) => {
  return {
    // 鼠标单击行
    onClick: () => {
      if (props.mode !== "multiple") {
        if (!props.rowClickRadio) return;
        // 单选
        const keys = [];
        const items = [];
        keys.push(record[props.keywords.value]);
        items.push(record);
        onSelectChange(keys, items);
      } else {
        // 多选
        const indexRow = state.selectedRowKeys.indexOf(record[props.keywords.value]);
        indexRow === -1 ? state.selectedRowKeys.push(record[props.keywords.value]) : state.selectedRowKeys.splice(indexRow, 1);
        if (indexRow === -1) {
          state.selectedRows.push(record);
        } else {
          state.selectedRows.splice(indexRow, 1);
        }
        onSelectChange(state.selectedRowKeys, state.selectedRows);
      }
    }
  };
};
// 单选键盘事件
const selectKeyup = (e: { keyCode: any }) => {
  if (!(props.mode === "multiple")) {
    if (!props.isKeyup) return;
    if (state.tableData.length === 0) return;
    switch (e.keyCode) {
      case 40: // 下键
        if (state.tableData[nowIndex.value + 1] !== undefined) {
          state.activeTableRow = state.tableData[nowIndex.value + 1];
          nowIndex.value = nowIndex.value + 1;
        } else {
          nowIndex.value = 0;
          state.activeTableRow = state.tableData[0];
        }
        break;
      case 38: // 上键
        if (state.tableData[nowIndex.value - 1] !== undefined && nowIndex.value > 0) {
          state.activeTableRow = state.tableData[nowIndex.value - 1];
          nowIndex.value = nowIndex.value - 1;
        } else {
          nowIndex.value = 0;
          state.activeTableRow = state.tableData[0];
        }
        break;
      case 13: // 回车
        if (state.tableData[nowIndex.value]) {
          const keys = [];
          const items = [];
          keys.push(state.tableData[nowIndex.value][props.keywords.value]);
          items.push(state.tableData[nowIndex.value]);
          onSelectChange(keys, items);
        }
        break;
    }
  }
};
// 动态添加类
const getRowClass = (record: any) => {
  // console.log("record--", state.activeTableRow);
  return state.activeTableRow[props.keywords.value] === record[props.keywords.value] && props.isKeyup
    ? "active-selected-row"
    : "";
};
// 默认选中（且只能默认选中第一页的数据）
const defaultSelect = (defaultSelectVal: any[]) => {
  if (props.mode === "multiple") {
    setTimeout(() => {
      if (defaultSelectVal.length > 0) {
        let multipleList: any = [];
        let selectedRowKeys: any = [];
        let selectedRows: any = [];
        defaultSelectVal.map((val: any) => {
          state.tableData.forEach((row: any) => {
            if (val === row[props.keywords.value]) {
              multipleList.push(row);
            }
          });
        });
        multipleList.forEach((row: { [x: string]: any }) => {
          state.tableData.forEach((item: { [x: string]: any }) => {
            if (item[props.keywords.value] === row[props.keywords.value]) {
              selectedRowKeys.push(item[props.keywords.value]);
              selectedRows.push(item);
            }
          });
        });
        state.selectedRowKeys = selectedRowKeys;
        state.selectedRows = selectedRows;
        // console.log("多选默认", selectedRowKeys, selectedRows);
        childSelectedValue.value =
          state.selectedRows.length > 0 && state.selectedRows.map((item: { [x: string]: any }) => item[props.keywords.label]);
        // console.log("childSelectedValue.value", childSelectedValue.value);
      } else {
        childSelectedValue.value = undefined;
      }
    }, 0);
  } else {
    setTimeout(() => {
      if (defaultSelectVal.length > 0) {
        state.tableData.map((val: { [x: string]: any }) => {
          if (val[props.keywords.value] === defaultSelectVal[0]) {
            state.selectedRowKeys = defaultSelectVal;
            state.selectedRows = [val];
          }
        });
        childSelectedValue.value = state.selectedRows[0] && state.selectedRows[0][props.keywords.label];
      } else {
        childSelectedValue.value = undefined;
      }
    }, 20);
  }
};
// RowKey配置
const getRowKey = (row: { [x: string]: any }) => {
  return row[props.keywords.value];
};
// 搜索过滤
const filterMethodHandle = (input: string) => {
  setTimeout(() => {
    const tableData = JSON.parse(JSON.stringify(props.table?.data));
    if (tableData && tableData.length > 0) {
      if (!(props.mode === "multiple")) {
        if (input) {
          state.selectedRowKeys = [];
        } else {
          tableData.map((item: { [x: string]: any }) => {
            if (item[props.keywords.value] === (state.selectedRows[0] && state.selectedRows[0][props.keywords.value])) {
              state.selectedRowKeys = [item[props.keywords.value]];
            }
          });
        }
      }
      state.tableData = tableData.filter((item: { [x: string]: string | any[] }) => {
        if (item[props.keywords.label].includes(input)) {
          return item;
        }
      });
    }
  }, 0);
};
// 表格显示隐藏回调
const visibleChange = (visible: boolean) => {
  // console.log("表格显示隐藏回调", visible);
  open.value = visible;
  if (visible) {
    if (props.defaultSelectVal && isDefaultSelectVal.value) {
      defaultSelect(props.defaultSelectVal);
    }
  } else {
    // findLabel();
    filterMethodHandle("");
  }
};

// tags删除后回调
const removeTag = (tag: any) => {
  const row = state.tableData.find((item: { [x: string]: any }) => item[props.keywords.label] === tag);
  if (row) {
    const indexRow = state.selectedRowKeys.indexOf(row[props.keywords.value]);
    indexRow === -1 ? state.selectedRowKeys.push(row[props.keywords.value]) : state.selectedRowKeys.splice(indexRow, 1);
    if (indexRow === -1) {
      state.selectedRows.push(row);
    } else {
      state.selectedRows.splice(indexRow, 1);
    }
    onSelectChange(state.selectedRowKeys, state.selectedRows);
  }
};
// 多选清空
const onSelectNone = () => {
  nextTick(() => {
    state.selectedRowKeys = [];
    state.selectedRows = [];
    childSelectedValue.value = [];
  });
};
// 清空后的回调
const clear = () => {
  if (props.mode === "multiple") {
    onSelectNone();
  } else {
    console.log("单选");
    nextTick(() => {
      state.selectedRowKeys = [];
      state.selectedRows = [];
      state.activeTableRow = {};
    });
  }
};
// 触发select隐藏
const blur = () => {
  selectRef.value.blur();
};
// 触发select显示
const focus = () => {
  selectRef.value.focus();
};
// 打开select下拉框
const openSelectDropdown = () => {
  open.value = true;
};
// 暴露方法出去
defineExpose({ focus, blur, openSelectDropdown, state });
</script>

<style lang="scss">
.t_antd_select_dropdown {
  .t-table-select__table {
    padding: 10px;

    .ant-table-body,
    .ant-table-header {
      margin: 0;
    }
    .ant-table-body {
      .ant-table-tbody {
        .ant-table-row {
          cursor: pointer;
        }
        .ant-table-row-selected,
        .active-selected-row {
          color: #409eff;
          background-color: #ecf5ff;
        }
      }
    }
  }
  .ant-pagination {
    flex-wrap: nowrap;
  }
}
</style>
